Instrumentation Engineering
2021 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE IN 2021 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.
Question 51
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A bar primary current transformer of rating 1000/1 A, 5 VA, UPF has 995 secondary turns. It exhibits zero ratio error and phase error of 30 minutes at 1000 A with rated burden. The watt loss component of the primary excitation current in ampere is __________ (rounded off to one decimal place).
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In the bridge circuit shown, the voltmeter V showed zero when the value of the resistors are:
,
, and
. If
, the value of
in ohm is _____.
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For the full bridge made of linear strain gages with gage factor 2 as shown in the diagram,
at 0 °C and strain is 0. The temperature coefficient of resistance of the strain gages used is 0.005 per °C. All strain gages are made of same material and exposed to same temperature. While measuring a strain of 0.01 at a temperature of 50 °C, the output
in millivolt is _____ (rounded off to two decimal places).
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